贵州玄武岩残积土崩解特性试验研究

SLAKING BEHAVIOUR OF WEATHERED BASALT RESIDUAL SOIL IN GUIZHOU

完成了2种不同风化程度的玄武岩残积土的崩解特性试验,通过对原状、烘干1h、风干48h 3种情况下试块的浸水崩解曲线的分析后发现:棕红色残积土的崩解速度较快;由于含水率的不同,原状土完成崩解的时间最长,烘干1h的次之,风干48h的最短。不同条件下试块的崩解破坏形式是不同的,烘干、风干试样由于经历了干湿循环的作用而崩解速度加快,其中大量裂隙的出现是玄武岩残积土发生崩解加快的主要原因。研究结果为玄武岩残积土层的边坡加固方案设计提供了依据。

This study carried out slaking tests of two different weathering of basalt residual soil, and analyzed the slaking curve of the undisturbed soil, dried one hour and weathered 48 hours. As a result,it was found .that the slaking velocity of the dark red sample was the fastest. Because of the different water contents, the slaking time for the undisturbed sample, the dried one hour sample and the weathered 48 hours sample lasted the longest, the second and the shortest of all, respectively. Slaking destroyed forms were different under different conditions and were influenced by content change. The fractures induced by wetting/drying cycle was the one of the most important facts in slaking of basalt residual soil. The results are useful for the design of protecting and strengthening measures for the basalt residual soil.