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

## TL;DR

This study examines how new railway construction affects nearby subgrade in loess regions, focusing on load transfer and displacement patterns.

## Contribution

A new formula is proposed to predict displacement ratios caused by filling height in railway subgrade construction.

## Key findings

- Monitoring data reveals load distribution laws on piles and soil in different construction stages.
- Filling height significantly influences earth pressure at various excavation steps.
- The proposed formula accurately describes displacement-to-filling-height relationships for similar projects.

## 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.