Short roadbed transition section structure between culverts of high speed railway

Abstract

The invention discloses a short roadbed transition section structure between culverts of a high speed railway. The structure comprises an inverted trapezoidal transition section and an intra-culvert transition section roadbed, wherein the inverted trapezoidal transition section roadbed is laid between a culvert and a roadbed; the intra-culvert transition section roadbed is laid between two adjacent culverts; both the inverted trapezoidal transition section and the intra-culvert transition section roadbed comprise surface layers of sub-grade beds; the intra-culvert transition section roadbed and the inverted trapezoidal transition section below the surface layers of the sub-grade beds are filled with the same material; the material is graded gravels doped with cement which accounts for 3 to 5 weight percent of graded gravels; and the space between the central lines of the two adjacent culverts is less than or equal to 45m. When the space between the central lines of the two adjacent culverts of the high speed railway is less than or equal to 45m, the graded gravels doped with cement which is 3 to 5 weight percent of graded gravels are filled in the intra-culvert transition section roadbed and the inverted trapezoidal transition section below the surface layers of the sub-grade beds; and thus the dynamic response superposition brought by the over-short distance between the two adjacent culverts can be resisted, and the rigidity between buildings and stable transition of the sedimentation can be realized.

Description

technical field [0001] The invention relates to the technical field of high-speed railway subgrades, in particular to the structure of a transition section of a high-speed railway culvert-to-culvert short-circuit subgrade. technical background [0002] In "Code for Design of High-Speed ​​Railways (Trial)" [TB10621-2009 J971-2009], the design of the transition section between embankment and lateral structures (interchange frame structure, box culvert, etc.) mainly has the following provisions: subgrade and lateral structures (interchange frame structure, box culvert, etc.), a transition section shall be provided, which may be in the form of an inverted trapezoidal transition section along the longitudinal direction of the line. It can be seen from the above that in the "Code for Design of High-Speed ​​Railways (Trial Implementation)", there are detailed design guidelines for the single transition section between culverts and subgrades. However, when the high-speed railway en...

AI Technical Summary

Problems solved by technology

When the distance between adjacent culverts is short, the transition between the culvert and the subgrade is designed separately for each culvert, and the two adjacent transition sections will intersect. At this time, the dynamic response of the high-speed train on the two adjacent culverts will be superimposed. , affecting the smooth operation of high-speed trains, causing a reduction in comfort and affecting high-speed driving safety

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