附加电场条件下吹填土的电性响应  

Analysis on Dredger Fill Electrical Response Under Additive Electrical Field

作　　者：欧孝夺[1,2] 黄展案[1] 柳子炎 潘鑫[1,2] 

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]广西大学工程防灾与结构安全教育部重点实验室,南宁530004

出　　处：《土木建筑与环境工程》2014年第1期81-86,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(51168004);广西自然科学基金(2010GXNSFD013002);教育部科学技术研究重点项目(210162)

摘　　要：以广西北部湾经济区吹填土作为研究对象,将土样置于稳定直流电场中,通过控制电场的有无,同时调整场强、土样含水率、密实度以及淡化程度,研究不同条件下土体内部电荷的变化规律,初步模拟雷雨云与大地之间的电性响应,以便进一步探究岩土体的"引雷"机制。结果表明,附加电场与大气电场均对土体内部电荷变化存在影响,且随着场强的增大表现得更显著;高含水率、低淡化程度,能促进电荷移动,增强土体导电性能,但含水率升高到一定程度后这种作用趋于稳定状态;土体密实度对其内部电荷分布具有一定影响,但规律性不明显。With the purpose of the study on change rule of internal charge in soil specimens under differing circumstances ,dredger fill ,which was collected from Guangxi Beibu Gulf Economic Zone ,was studied in various parameters ,including the absence/presence of the applied DC electric field ,different levels of field strength ,soil water content ,soil compactness ,and degree of desalination .Moreover ,through tentatively simulating the electrical response between thundercloud and earth mass ,the triggered lightning mechanism of rock soil mass was explored .The results show that both additive electrical field and atmospheric electric field had influence over charge variation of soil ,the impact of which would become more significant with the increasing field strength .Higher soil water content and lower degree of desalination could enhance the charge variation and conductivity of soil ,whilst this action effect would remain stable when soil water content reached a certain degree .Although soil compactness make some effect for the charge distribution , its regularity is undefined so far .

关 键 词：附加电场 吹填土 电荷 电性响应 

分 类 号：TU442[建筑科学—岩土工程]