岩土工程学报Issue(1)：47-53,7.DOI:10.11779/CJGE201501004
连云港海相软土在孔隙水盐分溶脱环境下的固结特性
Consolidation behaviors of soft marine clay in Lianyungang under desalination environment of pore water
摘要
Abstract
The marine soft clays, the quaternary sediments, are widely deposited in the sea transgression/regression environment in Lianyungang, Jiangsu Province, whose behaviors are focused recently with the implementation of the coastal development strategy. The salinity of pore water during deposition is relatively high, and with the erosion of the surface or underground freshwater, the desalination of pore water occurs, whilst its effect on soil behaviors of the natural soft clays is still unclear. The piezo-cone penetration tests (CPTu) and physical property experiments of the soft clays with salinity of pore water of 0.1% and 4.9% at two sites,e.g. Lianyungang-Linyi highway and Linhai highway, are conducted. The higher strength of the soils with more salinity at the same depth is observed, but they have the similar deposition environment, ratios of water content to liquid limit, particle-size distributions and mineral compositions. To further clarify the effect of pore water, the paralleled percolation and oedometer tests with the synthetic solution and deionized water are performed. The results show that the parameters of oedometer modulusEOed, consolidation coefficientCv and hydraulic conductivityk with the synthetic solution are higher than those with deionized water, while the compression indexCc, swelling indexCs and secondary consolidation coefficientCα are on the contrary. Those results will deepen the understanding of behaviors of Lianyungang marine clays and provide the reference for the offshore engineering.关键词
孔隙水盐分/溶脱环境/海相软土/固结特性/换盐与固结试验Key words
pore water salinity/desalination environment/soft clay/consolidation behavior/percolation and oedoemter test分类
建筑与水利引用本文复制引用
邓永锋,岳喜兵,张彤炜,刘松玉,杨忠超..连云港海相软土在孔隙水盐分溶脱环境下的固结特性[J].岩土工程学报,2015,(1):47-53,7.基金项目
国家自然科学基金项目（51378117，41330641）；水利水运工程教育部重点实验室暨国家内河航道整治工程技术研究中心开放基金项目 （）
