阳江地区海积软土工程特性研究  

Research on Engineering Properties of Marine Soft Soil in Yangjiang

作　　者：孙成科[1] 窦德功[1] 张旭光[1] Sun Chengke;Dou Degong;Zhang Xuguang(CCCC First Harbor Consultants Co., Ltd., Tianjin 300222, China)

机构地区：[1]中交第一航务工程勘察设计院有限公司

出　　处：《港工技术》2019年第B06期160-163,共4页Port Engineering Technology

摘　　要：通过对阳江地区海积软土进行试验研究得出,该区域软土具有较高的结构强度,为一种典型的结构性土,属中等灵敏度;当原状土样在低于60 kPa围压作用时,应力-应变曲线表现出应变软化,增加围压,土样固结时结构强度受到破坏,应变软化逐渐减弱,相应重塑土样的应力-应变关系曲线呈应变硬化型;海积软土的组成物质、孔隙结构、土壤颗粒间的连结方式,以及粘土中粘粒和粉粒在盐类和有机质的作用下形成结构强度造就了阳江地区海积软土具有结构强度。本文研究的方法和结论可为其它地区海积软土工程特性研究和应用提供参考。Through the experimental study on the marine soft soil in Yangjiang area, it is concluded that the soft soil in this area has high structural strength and is a typical structural soil with moderate sensitivity;when the confining pressure is below 60 kPa, the stress-strain curve of undisturbed soil shows strain softening. With the increase of confining pressure, the structural strength of soil will be damaged during consolidation, which will weaken the strain softening, the strain softening gradually weakens, and the stress-strain relationship curve of the corresponding remolded soil samples shows strain hardening type. The structural strength of marine soft soil in Yangjiang area is attributed to its composition, pore structure, the connection between soil particles, and the formation of structural strength of clay and silt particles under the action of salts and organic matter. The research methods and conclusions in this paper can provide reference for the study and application of engineering characteristics of marine soft soil in other areas.

关 键 词：海积软土 结构性土 化学特性 成因分析 工程特性 

分 类 号：TU447[建筑科学—岩土工程]