Research On Application Technology Of Embankment Reinforced Soil Retaining Wall In High-Speed Railway

Reinforced soil retaining wall with its stability, economic, good shape, simple construction and so on, are widely used in the field of railway, highway,bridge abutment, berm, terminals etc. reinforced soil technology are applied to railway sector early, but more conservative. Most technical specification of the domestic of the reinforced soil retaining wall with shoulder wall as research subjects and the introduction is detailed, but the study of the embankment wall is less. In this paper, the author studied the domestic rail specification and Federal Highway Administration(FHWA) specification of the United States about the embankment RSRW, the following key elements:(1) Aalculation method of the earth pressure in the domestic rail specification and FHWA specification for embankment RSRW are summarized; introduced several assumptions of earth pressure calculation for the embankment RSRW; analyzed the internal and external stability of the RSRW.(2) Analyzed situ test data about the embankment RSRW, including vertical soil pressure, lateral earth pressure, lateral earth pressure coefficient, lateral deformation, geogrid strain and potential rupture surface, etc.(3) The test data were analyzed and the influence of different height embankment construction and different operation of high-speed trains on the embankment RSRW were simulated with finite element software PLAXIS.Through theoretical basis, situ test and numerical simulation results can we know that the distribution of earth pressure embankment RSRW is nonlinear, which is different from theoretical value; the maximum lateral deformation of the wall panel is in the middle of the retaining wall; geogrid strain is smaller; embankment filling and track-laying have less effect on the retaining wall; train load on retaining wall has a certain impact, but the difference of the influence of static and dynamic load on retaining wall si not big.