风积沙路基工程特性和稳定性防护研究综述

State-of-the-art review on aeolian sand subgrade engineering characteristic and stability protection in desert highway

风积沙是重要的沙漠公路路基填料,其工程特性受到广泛关注。为深入梳理沙漠公路风积沙路基工程特性及稳定性防护,对风积沙的静力试验特性、压实特性、稳定特性和路基稳定性防护等方面有关工程实践和研究成果进行了综述。研究结果表明:风积沙是沙漠公路理想的路基填料;风积沙最大干密度和最佳含水率对控制风积沙压实特性具有重要影响;使用土工格室及化学添加剂等方法可有效改良风积沙路基的稳定性。沙漠风蚀和沙害会对风积沙路基产生不利且持续的影响,建议采取生物防护等多种防护措施。最后,对当前沙漠公路风积沙路基研究中存在的问题进行讨论,并展望了未来的研究方向。

Aeolian sand is an important desert highway subgrade filler,and its engineering properties have received extensive attention.To thoroughly sort out the engineering characteristics and stability protection of aeolian sand subgrade on desert highways,the engineering practice and research results of the static test,compaction,stability,and subgrade stability protection of aeolian sand were reviewed.The research results show that aeolian sand is an ideal subgrade filler for desert highways.The maximum dry density and optimal moisture content of aeolian sand have important effects on controlling the compaction characteristics of aeolian sand.Using geocells and chemical additives could effectively improve the stability of the aeolian sand subgrade.Wind erosion and sand damage would have adverse and continuous impacts on the aeolian sand subgrade in the desert,and it is recommended to take various protective measures such as biological protection.Finally,the problems existing in the current desert highway aeolian sand subgrade research are discussed,and future research directions have prospected.