膨胀土(岩)路堑施工中应重视的几个问题

On some problems in expansive soil cutting construction

针对膨胀土吸水性显著、膨胀软化、失水急剧收缩开裂及往复湿胀干缩的特性,从土石方开挖、基床换填、坡面植被快速恢复三方面,探讨了膨胀土路堑施工应重视的事项,从而避免膨胀土路堑病害的发生。

According to the features of the expansive soil including the evident water absorption,expansion and softening,cracks by sudden shrink of losing water,and repeated moisture expansion and drying shrinkage,the paper explores the precautions in the cutting construction from the earth rock excavation,bed replacement and filling,speedy resuming of slope plants,so as to avoid the cutting diseases of the expansion soil.