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代馨楠,贾永刚,唐美芸,等. 盐度变化对河口区沉积物工程性质影响[J]. 科学技术与工程, 2019, 19(31): 292-297.
代馨楠,et al.Influence of Salinity Change on Engineering Properties of Sediments in Estuary Area[J].Science Technology and Engineering,2019,19(31):292-297.
盐度变化对河口区沉积物工程性质影响
Influence of Salinity Change on Engineering Properties of Sediments in Estuary Area
投稿时间:2019-03-21  修订日期:2019-07-14
DOI:
中文关键词:  黄河口  盐度  含盐量  物理力学性质
英文关键词:the Yellow River Estuary  salinity  salt content  physical and mechanical properties
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)“黄河口海域盐度变化对入海泥沙沉降与固结及侵蚀过程影响研究”;“基于现场原位观测的黄河水下三角洲海底滑坡启动过程与控制因素研究”;“波致渗流对粉质土海床侵蚀影响的定量评价方法研究”
              
作者单位
代馨楠 中国海洋大学环境科学与工程学院
贾永刚 中国海洋大学环境科学与工程学院
山东省海洋环境地质工程重点试验室
唐美芸 中国海洋大学环境科学与工程学院
侯衍凯 中国海洋大学环境科学与工程学院
单红仙 中国海洋大学环境科学与工程学院
山东省海洋环境地质工程重点试验室
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中文摘要:
      河口区盐度场变化不仅会影响入海泥沙的沉降、固结特性,还会影响沉积物颗粒之间孔隙流体的盐度,改变沉积物的含盐量,从而进一步影响沉积物的工程性质。为了研究河口区盐度环境变化对沉积物工程性质的影响,通过现场观测与室内试验相结合的方法,确定河口区盐度场变化范围,并模拟不同盐度环境下沉积物的固结过程,对其进行物理力学性质的测定,最终建立起盐度环境与沉积物工程性质之间的关系。结果表明:黄河口海域盐度场与该区沉积物含盐量在水平方向上均存在非均匀分布,低盐度区域仅局限于河口区,整个海域沉积物含盐量变化范围在0.5‰~4.6‰之间;沉积物工程性质与盐度环境之间均存在良好的相关关系,盐度环境增加,沉积物含水率、液限、孔隙比、压缩系数随之减小,含盐量、容重、剪切强度、贯入阻力随之增加,且随着固结过程的推移,盐度环境对剪切强度与贯入阻力的促进作用减小。
英文摘要:
      The change of salinity field in the estuary area will not only affect the settlement and consolidation characteristics of the sediment, but also affect the salinity of the pore fluid between the sediment particles and change the salt content of the sediment. It further affects the engineering properties of the sediment. In order to study the influence of salinity change on the engineering properties of sediments, the field observation of the Yellow River Estuary and laboratory experiments were carried out to determine the range of salinity field and simulate the consolidation process of sediments in different salinity. At the same time, the physical and mechanical properties were measured to establish the relationship between salinity and the sediments engineering properties. The results show that both the salinity field and the salt content in the Yellow River Estuary are non-uniformly distributed in the horizontal direction. The low salinity area is limited to estuary, and the sediment salt content of the whole sea area varies from 0.5‰ to 4.6‰. There is a good correlation between engineering properties of sediments and salinity. Mainly show that the water content, liquid limit, void ratio and compressibility coefficient of sediments decrease with the salinity increase, while salt content, bulk density, shear strength and penetration resistance increase along with the increasing salinity. And as the consolidation process progresses, the promoting effect of salinity on shear strength and penetration resistance decreases.
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