Continuous heave was observed in a High-Speed Railway subgrade section, which caused severe track irregularity and damage to the concrete structure. After exploring the current relevant research and the construction information of the heave section, this paper addresses the causes and characteristics of the deleterious heave.

Displacement and temperature sensors were installed in field to investigate the heave and the ground temperature of different depths of the subgrade. Moreover, experiments were conducted to analyze the expansive potential, soluble salt content and mineral composition of the subgrade filling and ground soil using X-ray diffraction method. The results show that the sulfate attack-induced heave that usually occurs in cement stabilized fine aggregates can also occur in cement-treated graded macadam, and the heave can be attributed to the resultant ettringite and thaumasite. The sulfate attack-induced heave shows a high amount of relation to the ground temperature, and the reaction is more active when the ground temperature decreases from 15 °C to 5 °C. Furthermore, this paper intends to inspire more studies to propose efficient measures to mitigate and avoid the continuous heave.

在高速铁路路基断面观察到连续的起伏，造成严重的轨道不平整并损坏了混凝土结构。在探究了目前的相关研究和升沉段的施工信息之后，本文论述了有害升沉的原因和特点。

在现场安装了位移传感器和温度传感器，以调查路基不同深度的起伏和地面温度。此外，还进行了实验，利用X射线衍射法分析了路基填料和地面土壤的膨胀势，可溶性盐含量和矿物成分。结果表明，通常发生在水泥稳定的细骨料中的硫酸盐侵蚀诱发的隆起也可能发生在水泥处理的分级碎石中，并且该隆起可以归因于所得的钙矾石和高岭石。硫酸盐侵蚀引起的升沉与地面温度有很大关系，当地面温度从15°C降低到5°C时，反应更活跃。此外，