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在水利水电工程地质勘测中,以第四纪粗碎屑松散岩石作为水工建筑物地基是极其普遍的,而对建筑物基础的沉陷性及稳定性的评价,孔隙率与孔隙比的计算及挖方工作计划的制订都必须测定其天然容重。粗碎屑松散岩石容重值的大小,除与矿物成分及天然湿度有关外,实际上取决于粒级的大小和颗粒互相配置的紧密程度。由于结构的特点,在野外很难甚至不可能取得原状试样,因而测定方法完全不同于坚硬及粘结岩石。就现有的文献来看,野外测定的方法尚不多,笔者参照西马柯夫提出的筒坑两次充砂法的基本原理,并根据深达60米的探井中分段测
In the geological survey of water conservancy and hydropower engineering, it is very common to use the Quarry coarse loose rock as foundation of hydraulic structures, and the evaluation of the subsidence and stability of building foundation, the calculation of porosity and void ratio and The preparation of a work plan for the excavation must determine its natural bulk density. The bulk density of loose rock, in fact, depends on the size of the grain size and the tightness of the particles in each other’s configuration, in addition to the mineral composition and natural moisture. Due to the characteristics of the structure, it is difficult or even impossible to obtain the original sample in the field, so the determination method is completely different from the hard and bonded rock. According to the existing literature, there are not many methods for field determination. According to the basic principle of two sand filling methods proposed by Simov,