随着西部山区的基础设施建设进入迅速发展的阶段,越来越多的高填方工程正在或将要兴建,而对填料力学性质的认识也就成为决定这些高填方工程安全性的重要因素。通过一系列大型三轴试验,对分布于云南等地的陡坡寺中微风化料的剪切力学特性进行了研究。结果表明,陡坡寺中微风化料与典型堆石料的力学特性有很大不同,其强度较低,并且应力-应变关系、强度和刚度等特征都比较接近于细粒土。另外,水对陡坡寺中微风化料的力学特性有着显著的影响,其遇水后强度大为降低,因此,在设计和施工中必须予以充分考虑。对试验数据的拟合表明,邓肯-张模型能较好地模拟陡坡寺中微风化料在不同围压下的应力-应变关系。 With the rapid development of infrastructure in western mountainous areas, more and more high-fill projects are under construction or will be built, and knowledge of the mechanical properties of the packings will become an important factor in determining the safety of these high-fillings. Through a series of large-scale triaxial tests, the shear mechanics properties of the micro-weathered materials in the steep slope temple distributed in Yunnan and other places were studied. The results show that the micro-weathering materials in steep slopes are very different from the mechanical properties of typical rockfill materials, and the strength is low. And the stress-strain relationship, strength and stiffness are all close to fine-grained soil. In addition, the water has a significant influence on the mechanical properties of the breeze weathering material in the steep slope temple, and its strength after water contact is greatly reduced. Therefore, it must be fully considered in the design and construction. The fitting of the experimental data shows that the Duncan-Zhang model can well simulate the stress-strain relationship of the micro-weathered materials in steep slopes under different confining pressures.