Influence of dry and wet seasons on disintegration characteristics of basalt residual soil from the Leizhou Peninsula, China
Influence of dry and wet seasons on disintegration characteristics of basalt residual soil from the Leizhou Peninsula, China
复制标题
干湿季节对雷州半岛玄武岩残积土崩解特性的影响
DOI：
10.1144/qjegh2016-128
复制
发表时间：
2018
影响因子：
1.4
通讯作者：
Li J. J.
中科院分区：
文献类型：
--
作者：
Zhang X. W.;Kong L. W.;Li J. J.
玄武岩残积土受气候影响，崩解作用明显。大多数关于地球物质崩解的现有研究都集中在岩石上，对土壤的关注很少，并且不考虑气候影响。为了研究风化作用对玄武岩残积土的影响，对雷州半岛玄武岩残积土进行了干湿循环风化试验，并通过浸泡试验研究了干湿季节对玄武岩残积土风化作用的影响。结果表明，反复的干湿循环降低了土壤团聚体内部和之间的结合。空气中的崩解物质大部分由粗颗粒转化为细颗粒，这可能导致严重的崩解，而水中的崩解物质表现出从团块或碎片最终转化为泥。与倍半氧化物相比，土壤中其他化学成分和矿物的崩解作用不明显，与含膨胀性矿物岩石的崩解作用有明显差异。在结构退化中，气候影响加剧了崩解。在此基础上，我们解释了残积土的崩解机理。
Basalt residual soil shows significant disintegration owing to climatic influence. Most existing studies on disintegration of earth materials focus on rocks, with minimal attention given to soils, and do not consider climatic impact. To investigate the effects of disintegration on residual soils derived from basalt, samples from Leizhou Peninsula, China, were first subjected to wetting–drying cycles, used for disintegration test in air, and then soaked to assess the effect of the dry and wet seasons that occur in the area. The results showed that repeated wet–dry cycles reduced the bonding within and between the soil aggregations. The majority of disintegrated material in the air transformed from coarse particles to fine particles, which may lead to severe disintegration, and disintegrated material in water showed a transition from a lump or fragment eventually to mud. Furthermore, compared with sesquioxides, other chemical components and minerals in soils had a less prominent function in disintegration, which significantly deviated from that of rocks containing expansive minerals. Aggravation of disintegration by climatic influences was evident in the structural degradation. Based on these results, we have interpreted the disintegration mechanism of the residual soil.