摘要
为了研究河西粗颗粒盐渍土地基中盐分富集层的赋存形态对地表盐胀量的影响规律,通过现场调研并配合一系列的室内试验,探讨了盐分富集层的含盐量、厚度及埋深等因素诱发地表盐胀的界限值,并探讨了盐分富集层在粗颗粒硫酸盐渍土地基中埋深的敏感区间。研究表明：只有当盐分富集层含盐量大于5.3%,厚度大于38mm时,才可能诱发地表盐胀。且通过现场调研发现,在敦煌等地的盐渍土场地中,盐分富集层的埋深在1.25-2.0m深度范围内时,其对地表盐胀的影响较为显著。
In order to investigate the law of the influence of the occurrence mode of salinity-enriched layer in Hexi coarse-grain saline soil foundation on salt expansion on the earth＇s surface. The writer will probe into the salt content,thickness,burial depth and other factors of salinity enriched layer which may induce boundary value of salt expansion on the surface,as well as the sensitive range of the burial depth of salinity -enriched layer in coarse-grain saline soil foundation. It has discovered in the experiment that：only when the salt content is higher than 5.3 % in salinity -enriched layer and the thickness larger than 38mm can it cause the happen of earth surface salt expansion; it has also discovered in field research that in the saline soil area in Dunhuang and other places,the burial depth of salinity-enriched layer varies from 1.25m to 2. 0m,which has outstanding influence on earth-surface salt expansion.
出处
《甘肃科学学报》
2015年第5期90-94,共5页
Journal of Gansu Sciences
关键词
盐分富集层
厚度
埋深
含盐量
盐胀
Salinity-enriched layer
Thickness
Burial depth
Salt content
Salt expansion
