膨胀土蒸发过程的气候敏感性分析  

Analysis of climatic sensitivity of expansive soil in evaporation process

作　　者：曾召田[1,2] 吕海波[1,2] 赵艳林[1,2] 罗丹鹏[1,3] 

机构地区：[1]广西大学土木建筑工程学院防灾减灾研究所,广西南宁530004 [2]桂林理工大学广西岩土力学与工程重点实验室,广西桂林541004 [3]广西工程防震研究院,广西南宁530001

出　　处：《自然灾害学报》2013年第3期236-243,共8页Journal of Natural Disasters

基　　金：973前期研究专项(2010CB434810);国家自然科学基金项目(51169005);广西自然科学基金项目(2010GXNSFD013012;2013GXNSFBA019233)

摘　　要：膨胀土的工程特性对气候变化特别敏感。运用土体渗流和蒸发理论,建立了大气-非饱和土相互作用模型;以现场观测的气候数据作为边界条件,模拟分析了膨胀土柱蒸发过程中6个气象因子对蒸发的影响。研究结果表明,净辐射和风速对膨胀土蒸发影响显著,其它气象因子影响较小。Engineering properties of expansive soils are very sensitive to climate changes. Based on the theory of the soil seepage and evaporation, an interaction model of atmosphere-unsaturated soil was established in this study. With field climate observations as the boundary conditions, the influence of 6 meteorological factors on the evaporation process of expansive soil column was simulated and analyzed. Results show that the most significant factors that influence the expansive soil evaporation are net radiation and wind speed, while other meteorological factors are less significant.

关 键 词：膨胀土 蒸发过程 大气-非饱和土相互作用模型 气候敏感性 

分 类 号：TU443[建筑科学—岩土工程]