肯斯瓦特水利枢纽坝址区主要岩石为白垩系泥质砂岩和砂质泥岩，前期勘察结果曾判为软岩，最终确定为中硬岩。随着研究程度的加深和认识不断提高，逐步发现忽略该岩石特有的崩解性特征，是导致岩石室内试验结果不一致的主要原因之一。常规岩石物理性质试验可以获得耐崩解性指数Id ，但该指标没有统一的衡量标准，也缺乏直观性。通过工程勘察实践及现场观察试验方法，试图取得直观判断岩石崩解特性途径，效果良好。同时也为地面建筑物、地下开挖和边坡工程的设计和施工提供合理的地质建议。%Main rocks of the Ken Swart dam site area are cretaceous argillaceous sandstone and sandy mudstone ,prelimi-nary survey results identified as soft rock ,but ultimately determined that is medium hard rock .Through phased prospec-ting,with the reaserch degree deepening and understanding of continuous improved ,gradually found that ignore the disin-tegration characteristics of the rock ,it is the main reason for the laboratory tests ’results disaccord .The routine rock phys-ical properties test can obtain the disintegration index Id but there is no uniform standard of measurement ,and lack intui-tive.This paper through the engineering prospecting practice and some of the field observation test method ,attempts to find visual judgement of the disintegration characteristic of rock ,and the effect is good .At the same time ,it will provide reasonable geological suggestion for the design and construction of the surface buildings , underground excavation and slope engineering .
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