大顶子山泥岩特性探讨及在施工中的应用

An Approach to Mudstone Characteristics of Dadingzi Mountain and Application of Research Result

由于松花江干流大顶子山航电枢纽工程建基岩石为泥岩,薄层状构造,层理发育,迅速失水后,表面即发生龟裂,经过干湿交替后大部分崩解成碎块。文中建议开挖过程中保证建基面不失水,以免岩石整体性和强度降低。施工效果较好。

Since the construction base layer of Songhuajiang Dadingzishan Navigation-Power Junction is mudstone, which is of thin-layer structure, cracks will occur on the surface after abrupt lost of water, and a great part will crush into pieces after experiencing dry-wet ahernation. Thus it is suggested to guarantee ＂no loss of water on the construction base layer during excavation＂ , to avoid decrease of integrity and intensity of rocks. It has achieved a satisfactory construction effect.