Relying on the construction of railway and highway engineering,on the basis of field investigation,indoor and in-situ tests,the distribution characteristics,geotechnical types,material composition,particle composition,degree of cementation and physico-mechanical properties of the moraine layer in the Northwest Yunnan region are mainly studied,and the foundation strength and slope stability of moraine layer are comprehensively evaluated.According to the distribution characteristics of the moraines,the moraines layer can be divided into depression type,terrace type and valley shoulder type.According to material composition,they can be divided into breccia and gravel mixed soil,and they are with good bearing capacity and foundation stability.The uniaxial compressive strength of breccia is higher.The shear strength of crushed stone mixed soil is higher,but the water stability and foundation uniformity are poor.The slope of moraine layer has good local self-stability,but there may be weak interlayers at the bottom and between layers.
关键词
滇西北地区/冰川作用/冰碛层/分布特征/工程效应/岩土类型
Key words
Northwest Yunnan region/glaciation/moraine layer/distribution characteristics/engineering effects/geotechnical type
维普
万方数据