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在贵州地区的工程建设中,遇到石炭系大塘阶黑色软岩产生特殊的工程病害:边坡开挖后岩石风化迅速、短时间内崩解破碎,发生边坡失稳;其风化残坡积土在缓坡地带遇水形成特殊的“坡麓相斜坡软土”。本文通过分析研究,认为岩石中含有的特殊矿物是其发生工程病害的根本原因,提出了针对性工程措施。病害过程为:岩石暴露后发生一系列氧化反应及聚合反应,导致边坡破坏;岩石风化物堆积在缓坡地带,在水的作用下形成的斜坡软土。
In the project construction in Guizhou area, special engineering problems occurred in the black soft rock of the Great Tang formation in the Carboniferous: the rocks rocked rapidly and collapsed and crushed in a short period of time after the excavation of the slope, and the instability of the slope occurred; Fill in the gentle slope zone with water to form a special “slope slope slope soft soil.” In this paper, through analysis and research, it is considered that the special minerals contained in rocks are the root cause of the engineering diseases and the engineering measures are put forward. The disease process is as follows: a series of oxidation reactions and polymerizations occur after the rock is exposed, leading to the destruction of the slope; rock weathering objects accumulate in the gentle slope zone and the slope soft soil formed under the action of water.