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冻结气温降幅对潜水入流量影响的试验研究 被引量:2
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作者 陈军锋 杨军耀 +2 位作者 郑秀清 秦作栋 刘化涛 《中国农学通报》 2015年第2期254-258,共5页
为了揭示冻结气温降幅对潜水入流量的影响,通过室内冻结试验装置设定地下水位埋深为87.5 cm,进行了3种冻结气温降幅,2种土壤质地的单向土壤冻结试验,监测潜水入流量的变化。结果表明:大幅降温冻结下,潜水入流速率较大,冻结第41天砂壤土... 为了揭示冻结气温降幅对潜水入流量的影响,通过室内冻结试验装置设定地下水位埋深为87.5 cm,进行了3种冻结气温降幅,2种土壤质地的单向土壤冻结试验,监测潜水入流量的变化。结果表明:大幅降温冻结下,潜水入流速率较大,冻结第41天砂壤土和粉质粘壤土潜水入流量分别较小幅降温冻结下的潜水入流量高51.8 mm和50.7 mm;冻结气温降幅越大,潜水入流量受土壤质地的影响越明显,小幅降温、中幅降温和大幅降温冻结下,第41天砂壤土潜水入流量较粉质粘壤土潜水入流量分别高8.6 mm、11.5 mm和14.2 mm;土壤颗粒直径越小,潜水入流量对冻结气温降幅的响应越早。研究成果对于地下水浅埋区地下水资源量的科学评价和土壤盐碱化防治等具有重要的指导意义。 展开更多
关键词 冻结气温 潜水入流 土壤 壤土 粉质粘壤土
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Liquefaction Assessment in Golem Area, Albania, by Means of In-situ Tests
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作者 Shpresa Gashi Neritan Shkodrani 《Journal of Civil Engineering and Architecture》 2015年第5期547-553,共7页
The liquefaction is a very significant phenomenon in clayey silty soils, silty sands and also sands. The high potential of liquefaction is generally recognized when these types of soils are laid under the hydrostatic ... The liquefaction is a very significant phenomenon in clayey silty soils, silty sands and also sands. The high potential of liquefaction is generally recognized when these types of soils are laid under the hydrostatic water table. Low plasticity silts, silty sands and sands are found as recent alluvial deposits in the western coastal part of Albania, especially in the sandy beaches of Adriatic Sea near Durres City. The aim of this study is to evaluate the soil liquefaction potential in the area of Golem. Ten CPTUs (cone penetration test with pore pressure measurements) are carried out for the site investigation of soils. In this paper, results of the CPTU based liquefaction analysis are presented. The data of two CPTUs (10 in total) are analyzed and factor of safety was found by considering different levels of hazard and ground water. The results of liquefaction potential analysis show that the soils in the area of Golem have a high risk of liquefaction. 展开更多
关键词 Cone penetration test liquefaction potential cyclic resistance ratio cyclic stress ratio safety factor.
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