CAJ | 학술논문

吹淤造陆工程的物源差异是影响工程处理难易程度的主要原因之一。针对沿海地区类型多样的吹填土，从粒度成分、矿物成分、物理化学性质等方面做比较分析。根据试验结果，发现大亚湾某吹填工程现场与其他地区具有相似的物质组成和环境条件，土样颗粒相对细小，粒度组成以黏粒组为主，因此在物理性质中表现出塑性指数大，阳离子交换量大、有机质含量高、在塑性图内位于高液限黏土区的特殊性质；另外，受海湾区域内复杂的沉积物分布影响，不同地区吹填土的矿物变化规律不明显；而化学成分中易溶盐含量高，以钠离子和氯离子为主要化学成分，导致土体的微观结构单元体形成一定的胶结作用，造成土体物理化学性质不稳定。
취어조륙공정적물원차이시영향공정처리난역정도적주요원인지일。침대연해지구류형다양적취전토，종립도성분、광물성분、물이화학성질등방면주비교분석。근거시험결과，발현대아만모취전공정현장여기타지구구유상사적물질조성화배경조건，토양과립상대세소，립도조성이점립조위주，인차재물이성질중표현출소성지수대，양리자교환량대、유궤질함량고、재소성도내위우고액한점토구적특수성질；령외，수해만구역내복잡적침적물분포영향，불동지구취전토적광물변화규률불명현；이화학성분중역용염함량고，이납리자화록리자위주요화학성분，도치토체적미관결구단원체형성일정적효결작용，조성토체물이화학성질불은정。
Materials of reclaiming land is one of the main factors effecting on consolidation efficiency which can be decreased by fine particles.The characteristics of the granule and mineral compositions, physical and chemical properties of dredger fills from various coastal areas were obtained by experiments. It was shown that the dredger fill from the Daya Bay engineering field is similar to that from other areas, which have many fine particles in compositions.The Daya Bay dredger fill is characterized by high plastic index,high cation exchange capacity (CEC),and high organic matter content.Furthermore,it was con-cluded that the Daya Bay dredger fill is one kind of high liquid clay with the same as that in some other high clay content areas.Besides these,minerals in different dredger fills were not obviously different due to the complex environment of sediment distribution in bay areas.The cementation effect of the fills with high content of sodium and chloride ions in various coastal areas results in unstable chemical and physical properties of the soils.