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一、前言 四川西部山区河谷深厚覆盖层堆积,是这个地区水力资源开发中突出的工程地质问题之一。 河谷深厚覆盖层结构与其成因、物理力学特性是评价工程地质条件必不可少的内容。长期以来,地质勘探中广泛使用的常规钻探手段、覆盖层取样方法很不完善,影响了地层剖面的正确划分,阻碍了试验研究工作的进展。60年代,北京水电科研院研制的砂层
I. Preface The deep layering of the mountainous valleys in western Sichuan is one of the prominent engineering geological problems in the development of hydraulic resources in this area. The deep overburden structure of the river valley and its causes, physical and mechanical characteristics are the essential contents to evaluate the engineering geological conditions. For a long time, the conventional drilling methods widely used in geological prospecting and the sampling method of overburden are imperfect, affecting the correct division of stratigraphic sections and hindering the progress of experimental research. In the 1960s, the sand layer developed by Beijing Hydropower Research Institute