翠湖湿地软土触变性试验研究  

Experimental research on thixotropy of wetland soft soil in Cuihu

作　　者：李丽华[1,2] 陈轮[1] 高盛焱[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [2]湖北工业大学土木工程与建筑学院,武汉432200

出　　处：《岩土力学》2010年第3期765-768,共4页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No50578086);科技部资助课题(No2005Z1104)

摘　　要：利用自行研制的微型十字板剪切仪对翠湖湿地软土的触变性进行了试验研究。观测了湿地软土扰动后由不同静置时间引起的抗剪强度的变化,确定了扰动后湿地软土的抗剪强度恢复时间、恢复程度、灵敏度以及触变强度比率。对湿地软土的触变性进行了3个不同深度处的试验研究,得到了深度和静置时间对扰动后土体抗剪强度恢复的耦合影响。对湿地重塑土样进行了不同含水率的试验研究,得到了湿地软土含水率和抗剪强度的对应曲线。试验结果可为深入研究湿地软土工程力学性质提供依据,也可为沼泽湿地的合理开发利用提供参考。Thixotropic research on wetland soft soil in Cuihu is carried out by manual vane-shear apparatus. The change of sample＇s shear strengths resulted from different stewing times is observed, which can determine the recovery time and recovery degree of shear strength, sensitivity and thixotropic strength ratio. The thixotropy of wetland soil is studied at three depths of soil, which can obtain the coupling effect of depth and stewing time on recovery of soil shear strength. Remoulded samples are studied by different moisture contents tests. The curves of moisture content and shear strength are gained. Test results may provide reference for further study of engineering properties and proper development of wetland soft soil

关 键 词：湿地软土 触变性 触变强度比率 静置时间 不同深度 

分 类 号：TU44[建筑科学—岩土工程]