摘要
为了研究在极端干旱条件下云南鸡街盆地膨胀土的大气影响深度,取该地区雨季前、后膨胀土样测试其含水率,并结合2009～2010年云南省气象资料,对降雨量和蒸发力的异常情况进行综合分析。采用现场试验结合规范公式计算方法,研究极端干旱对膨胀土大气影响深度的影响。结果表明:在极端干旱条件下,无法运用规范给出的膨胀土湿度系数表来确定大气影响深度;浅层土体中含水率变化幅度较大,膨胀土对建筑物的破坏可能会加重,应引起重视。
In order to study the air-influenced depth of expansive soil of Jijie Basin in Yunnan Province under extreme drought,through measuring the water content of expansive soil before and after rainy season in this area,combining the meteorological data of 2009～2010,the abnormal condition of evaporation power and rainfall is analyzed comprehensively.Using the method of in-site testing and standard formula,the air-influenced depth in expansive soil under extreme drought is studied.The results show that under the condition of extreme drought,the air-influenced depth can not be determined by the humidity coefficient given by the standard;the water content in shallow soil has large variation amplitude.The expansive soil would damage the buildings at a larger extent,which should be focused.
出处
《人民长江》
北大核心
2011年第24期61-64,共4页
Yangtze River
关键词
极端气候
干旱含水率
膨胀土
大气影响深度
云南省
extreme climate
water content under drought condition
expansive soil
air-influenced depth
Yunnan Province
