RELATIONSHIP BETWEEN RAINFALL AND DELAYED COLLAPSE ALONG RAILWAYS

Abstract

 In railways, train operation control is implemented to ensure safety during rainfall. However, collapse caused by rainfall may occur after train operation restrictions are lifted. In considering disaster prevention measures for railways, it is important to clarify the causes and rainfall conditions of such delayed collapse. So in this research, rainfall conditions related to delayed collapse are considered, targeting five delayed-collapse incidents that occurred on railways. As a result of examination, incidents of collapse were classified into three types: concentration of water infiltration in surface soil, concentration of spring water, and rise of groundwater pressure in foundation ground. It was then shown that the storage height calculated from the storage function method and the standard tank model method was valid as a rainfall index in delayed collapse, considering the behavior of rainwater in the soil for each form.