多年冻土环境变化对青藏铁路工程的影响

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DOI:10.19981/j.CN23-1581/G3.2026.11.023

中图分类号：U216.41

文献标志码:A

文章编号:2095-2945(2026)11-0105-04

Abstract: With global warming, the permafrost environment on the Qinghai-Xizang Plateau has undergone significant changes, posing potential threats to the stability and durability of the Qinghai-Xizang Railway project. Based on long-term monitoring results and relevant research findings, this paper systematically analyzes the characteristics of permafrost environment changes, explores their impact mechanisms on engineering facilities such as subgrades, bridges, and culverts of the Qinghai-Xizang Railway, and assesses the risks faced by the project. The research shows that the increase in temperature leads to permafrost degradation, which causes diseases such as subgrade settlement, bridge foundation deformation, and culvert cracking, affecting the safety of railway operation. It is suggested to strengthen long-term monitoring, improve engineering design standards, and develop new protective technologies to ensure the long-term stable operation of the Qinghai-Xizang Railway in a changing environment.

Keywords: permafrost; environmental change; Qinghai-Xizang Railway; engineering impact; coping strategies

青藏铁路格尔木至拉萨段(简称“格拉段”)是世界上海拔最高、线路最长的多年冻土区铁路,全长1142km,其中多年冻土区段占比达47.9%(546.41km),涵盖高温冻土、低温冻土及融区等复杂冻土类型 [1-5] 。（剩余7079字）