工程地质学报
工程地質學報
공정지질학보
2014年
4期
531-535
,共5页
微观结构%孔隙水%SEM%压汞
微觀結構%孔隙水%SEM%壓汞
미관결구%공극수%SEM%압홍
Microstructure%Pore water%SEM%Mercury injection
采用宏观力学行为和微观结构定量分析相结合的方法，论文探讨了饱和软土中结合水对其固结、蠕变的影响。首先，采用SEM、压汞及最大吸水量等量测技术，对各级荷载下软土的孔隙级配进行了分析，并对淤泥土固结变形过程中微观结构变化特征进行定量研究，发现伴随着结构强度逐渐丧失和固结过程中不同类型孔隙水的排出，并对软土孔隙中的自由水及结合水进行了划分。其次，通过高压固结试验发现软土的固结过程明显存在两个阶段，前者主要与自由水有关，而后者则与结合水的行为有关。通过蠕变试验，分析了软土的黏滞系数η与结合水膜的厚度相关关系。
採用宏觀力學行為和微觀結構定量分析相結閤的方法，論文探討瞭飽和軟土中結閤水對其固結、蠕變的影響。首先，採用SEM、壓汞及最大吸水量等量測技術，對各級荷載下軟土的孔隙級配進行瞭分析，併對淤泥土固結變形過程中微觀結構變化特徵進行定量研究，髮現伴隨著結構彊度逐漸喪失和固結過程中不同類型孔隙水的排齣，併對軟土孔隙中的自由水及結閤水進行瞭劃分。其次，通過高壓固結試驗髮現軟土的固結過程明顯存在兩箇階段，前者主要與自由水有關，而後者則與結閤水的行為有關。通過蠕變試驗，分析瞭軟土的黏滯繫數η與結閤水膜的厚度相關關繫。
채용굉관역학행위화미관결구정량분석상결합적방법，논문탐토료포화연토중결합수대기고결、연변적영향。수선，채용SEM、압홍급최대흡수량등량측기술，대각급하재하연토적공극급배진행료분석，병대어니토고결변형과정중미관결구변화특정진행정량연구，발현반수착결구강도축점상실화고결과정중불동류형공극수적배출，병대연토공극중적자유수급결합수진행료화분。기차，통과고압고결시험발현연토적고결과정명현존재량개계단，전자주요여자유수유관，이후자칙여결합수적행위유관。통과연변시험，분석료연토적점체계수η여결합수막적후도상관관계。
This paper discussed the influence of the bound water on the consolidation and creep behavior of saturated soft soil using the method combined the macroscopic mechanical behavior with quantitative analysis of the microstructure.First,measurement techniques such as SEM,mercury injection and the maximum amount of water absorption were applied to test the pore grading of the soft soil under different load levels,and the variation of the microstructure in the consolidation deformation process of the silt soil was quantitatively analyzed.It is found that a gradual loose of structural strength and discharge of different types of pore water occur in this process.The free water and bound water in the pore of the soft soil were divided.Then,the high pressure consolidation test reveals that there are two distinct phases during the consolidation process.The former is mainly concerned with the free water,whereas the latter has a close relationship with the behavior of the bound water.The correlation between the coefficient of viscosity ηand the thickness of water film in the soft soil was analyzed based on the creep test.
