Study on load transfer mechanisms and impact on adjacent railway subgrade within loess regions

Wenhui Zhao; Ke Zhang; Jinjiang Xu; Xueli Liu

doi:10.1016/j.heliyon.2024.e30085

Study on load transfer mechanisms and impact on adjacent railway subgrade within loess regions

Heliyon. 2024 Apr 26;10(9):e30085. doi: 10.1016/j.heliyon.2024.e30085. eCollection 2024 May 15.

Authors

Wenhui Zhao¹, Ke Zhang¹, Jinjiang Xu¹, Xueli Liu¹

Affiliation

¹ School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China.

Abstract

Clarifying load transfer mechanism and the influence of the widening of a newly-built railway is the premise for the construction of adjacent project in loess region. This paper uses monitoring datas obtained from three sections in different stages to analyze the distribution laws of load exert on piles and soil between piles, investigates the variation laws of filling height on the earth pressure at different excavation steps and elucidates the influence of the filling height of newly built subgrade on the existing subgrade. In addition, a fitting formula y = a(1-e^-bx) + cx is proposed to describe the relationship between the ratio of the additional displacement to the filling height, which is applicable for similar projects.