Possible Problems of Silty Soils Caused by Cyclic Loading from Train Operations

Abstract

Silty soils are generally moderately strong under normal conditions, but they can weaken in certain situations, especially when subjected to repeated loading. This review article compiles and analyzes current knowledge on the behavior of silty soils under cyclic loading caused by train operations, which may result in failure of railway structural systems, particularly in newly constructed railways. Studies indicate that several factors influence the mechanical changes in silty soils and the potential for liquefaction, which affects the stability of railway foundations. These factors include the soil’s inherent properties, low plasticity index, frequency and magnitude of cyclic loading, and groundwater presence. Additionally, silty soil deposits are found in Chiang Rai Province, where liquefaction occurred due to an earthquake in 2014. With the ongoing construction of a railway from Den Chai District, Phrae Province, to Chiang Khong District, Chiang Rai Province, there is concern that silty soils along the route may weaken. Therefore, further research is needed to study the behavior of silty soils in this railway section under cyclic loading from train operations. The findings will help develop preventive or corrective measures to mitigate potential issues.