In recent decades, climate warming on the Qinghai-Tibet Plateau (QTP) can accelerate permafrost warming and has caused permafrost degradation, which leads to the decrease of bearing capacity of the permafrost foundation. 

A crushed-rock revetment (CRR) with high permeability that can be paved on embankment slopes is widely used to cool and protect the subgrade permafrost. However, traditional CRR over warm permafrost is facing problems that affect its long-term effective cooling performances. 

Recently, a research team from Northwest Institute of Eco-Environment and Resources (NIEER) of Chinese Academy of Sciences (CAS) designed a new mitigation structure (NMS) to improve the cooling capacity of the CRR and to counter the pore-filling of the rock layer.