![]() ![]() Since the 1990s, China has completed aeolian sand tunnel projects such as the Xingshumao Tunnel, Jingpeng Tunnel, and Qiansongba Tunnel. Owing to its engineering nature, transportation construction in desert areas has always been extremely difficult. Aeolian sand is the main landform in the desert areas. An aeolian sand series results from the flow and movement of sand, and is characterized by its strong fluidity and ease of slip 1, 2, 3, 4. They are distributed in Xinjiang, Inner Mongolia, Qinghai, Gansu, and other northwestern regions, accounting for 95.37% of these areas. This accounts for approximately 16% of the total territorial area of China. Additionally, results of numerical analysis indicated that an approach based on a concept of “horizontal jet grouting pile + benching partial excavation method with a temporary invert” is suitable for the construction of tunnels in aeolian sand in China.ĭeserts and sandy land cover a total area of 1.54 million square kilometers in China. ![]() Furthermore, it was determined that superfine cement grout and modified sodium silicate grout can be injected, but the former exhibits a poor reinforcement effect. Based on a field grouting test, it was determined that it is difficult to inject ordinary cement grout into an aeolian sand layer. 1 tunnel was conducted to investigate the engineering characteristics of aeolian sand tunnels, compare the grouting effects of commonly used grouting materials, and discuss the reinforcement effects of different construction schemes in aeolian sand tunnels. Therefore, in this study, a case study of the Shenmu No. Several challenges, such as the poor self-stabilization ability of the surrounding rock, difficultly in injecting grout, and insufficient construction experience, restrict the construction of road tunnels under this stratum. ![]() ![]() The naturally formed aeolian sand dunes in northern Shaanxi exhibit unique engineering characteristics. ![]()
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