新疆砾岩红层工程地质特性与勘察要点

Engineering Geological Properties and Investigation Keystones of Xinjiang Conglomerate Red Stratum

以新疆维吾尔自治区北疆地区位于同一侏罗系砾岩地层上的两水利水电工程坝址前期勘察成果为基础,结合施工开挖扰动破坏及水库蓄水浸泡后岸边稳定情况,对该砾岩红层工程地质特性以及勘察工作要点进行了总结。结果认为,该红层采取一定工程措施后具备修建高坝的地质条件;但其岩石软化系数低,不能满足混凝土骨料料源要求。若作为堆石料,其透水性较差。

This paper summarizes the engineering geological properties and investigation keystones by combining the disturbance and destruction after excavation and stability of slopes on both sides after reservoir storage on the basis of preliminary fruitful of investigation of conglomerate red stratum in two dam sites of Jurassic stratum, the outcome shows that it has qualified geological conditions on which to build high dam after certain treatments, but for its low coefficient of softening, rocks of the stratum can not meet the requirement of being as source of aggregates, and the permeability is poor when it is used for rock fill materials.